Method for the manufacture and rebuilding of cutter chains



J. F. JOY 2,040,852

METHOD FOR THE MANUFACTURE AND REBUILDING OF CUTTER CHAINS May 19, 1936.

Fil ed Aug. 16, 1933 2 Sheets-81186151 INVENTOR JOSEPH F. J07. Q A I r. TCFNEYS 2 Sheets-Sheet 2 INVENTOR ATTORNEIG J. F. JOY

Filed Aug. 16, 1933 METHOD FOR THE MANUFACTURE AND REBUILDING OF CUTTER CHAINS May 19, -1 936.

aj m A W NV/ M a m E: i/ :1: a 6 %M w v 3 H W\\ r J a m f 5 Patented May 19, 1936 UNITED STATES PATENT OFFICE 2,040,852 METHODYFOR THE MANUFACTURE AND REBUILDING OF CUTTER CHAINS Joseph F. Joy, Marion, Ohio, assignor to Sullivan Machinery Company, Chicago, 111., a corporation of Massachusetts Application August 16,1933, Serial No. 685,398 Claims. (01. '75-101) My invention relates to a method for the manthe teeth to insure their uniformity. When one ufacture and rebuilding of cutter chains. chain tooth has been suitably built up and gauged, It is the object of my invention to provide a the gauge and template may be slid longitudimethod of manufacturing and rebuilding a cutnally into gauging position with respect to the 5 ter chain by applying hardenedportions to the next succeeding tooth. 5 teeth of the chain after the chain has been as- 'The base I is provided with the seat bracket sembled and for aligning the angularity of the i5 and an adjustable seat ii for the operator. links of the chain so as to insure the proper po-' This mechanism is used for supporting, alignsition of thehardened cutting surfaces, both during and gauging the teeth as they have their ing the process of manufacture and the rebuilding tips provided with hard material according to the 10 of the teeth as they become worn. Other objects method shown in Figure 5. of the invention will, however, hereinafter more This part of the invention comprises the use fully pp of a rod ll of hard material which is applied to In the accompanying drawings there is shown the tip l8 of a'tooth IS in the path of a flame 20 for purposes of illustration one form which the of an oxygen-hydrogen blow-torch 2|. The 15 invention may assume in practice. melted hard material is thus transferred from the Referring to the drawings: rod H to the tip I 8 until the tip is built up into a Figure 1 'is a top plan view of the apparatus sharp hard point as at 22. Each tooth is gradual- Of y inVBntioh; ly built up step by step by gradual application of Figure 2 is a side elevation thereof from the hard material to the cutting point until a tooth 20 side on which the operator sits; of substantially the desired shape is attained.

Figure 3 is a section on the line 3--3 of Fig- After it is thus built'up, it may be gauged by e the apparatus heretofore described.

Figure 4 is a detail side elevation of the tem- Heretofore, it has been the custom to form the plate and gauge; teeth out of hard material which was diflicult 25 Figure 5 is a detail view of the position of the and expensive and then to grind the teeth to parts and method of application of the hardensharp points. This was time-taking, was tedious ing material in building up the hard cutting point and was expensive.

on the teeth of the chain; By applying the high heat of an oxygen-hydro- 0 Figure 6 is a section on the line 6-6 of Figgen flame to the very hard material which is 3 ure 1. supplied in a rod and gradually withdrawing the Referring to the drawings in detail, I is a rod until the part of the rod that is transferred platform or floor, to which are connected horito the tooth separates from the rod, I am enabled zontal braces '2, the ends of which extend upto provide a quick, cheap and easy means of prO- r wardly as at 3 to form a base support 4 to which viding a sharp-pointed, hard-cutting point on is bolted the guiding trough 5 having aslot 6 for each link of the chain comprised of the cutting receiving the base of the chain that is being teeth. V worked upon. After the cutter chain has been in use for a The table 4 is formed with arcuate guiding suflicient time, the pointed tips of the teeth be- 40 ends 1 for guiding the chain .to and from the come blunt by wear. When this occurs, the chain table and for supporting it in position on the ma be repointed by welding a rod of the hard tab1etip material to the worn tip under the influence Mounted on the table for adjustment longiof the oxygen-hydrogen blow torch 2|. The rod tudinally relative thereto is a combined template i th n dr away from the tooth while the and gauge pr n a h p d frame 8 w ich point of juncture therebetween is heated to a is Provided With bolts a d ts se t d in semi-fluid state until the rod separates from the r v II in the i in tr u h The eletooth, leaving a sharp hard point on the tooth ments a slidably guided in th ud na at the point of separation from the rod, as preguiding grooves ll of the trough 5, thereby to viously described. In this way, a worn cutter r enab e dj t nt of the gauge and e plate chain may be quickly and economically renewed. longitudinally with respect to the table. Hinged In order to prevent this operation from proto one of the arms 8 as at I2 is a cover plate l3 viding a temperature that will be sufilclent to that has bolted thereto a notched gauge block anneal the temper of the chain or ruin its original M which acts both as a gauge and as a template heat treatment and thereby decrease its wearing 5 for determining and positioning the length of qualities at the pin connections, I provide the welding stand of this invention with a relatively heavy crosrsection of a chain guide 5 so that the temperature in the body of the link will be removed and the heat dissipated throughout the body of the chain. This is the heat that results in the welding operation at the tip of the teeth.

By this dissipation, the heat does not modify the temper of therest of the chain. -I likewise keep the chain in an upright position for tipping and by sliding the gauge I can maintain a relatively uniform length of tooth.

'It will be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it tovarying conditions and uses. v 7

Having thus fully described my invention,what I claim as new and desire to secure by Letters Patent, is:

1. In a method of applying a hardened point of metal to a toothed element of a chain, placing a rod of hard material on the point of the chain element in alignment with the cutting surface thereof, applying a flame at right angles to the axis of the rod at the point of juncture of the rod with the chain element, and gradually withdrawing the hard rod as the end thereof is transferred under the flame to the point of the chain so that the point is built out in line with the cutting edge of the chain element.

2. In a method of forming a pointed cutting tooth for a cutting chain, forming the tooth of relatively soft material with a blunt cutting point and building out the cutting point with a hardfaced tip formed in a sharp point by applying a rod of hard material to the blunt point of the cutting tooth in a hot flame, melting the hard material in the flame, and gradually withdrawing it as the hard material is built up in a point on the end of the tooth whereby a sharp point is formed on the tooth without grinding and of hard mate rial.

3. In a method of manufacturing a sharppointed cutting tooth having a point of hard material, forming a blunt pointed cutting tooth of soft material, applying a to the point to be built up, applying a hot flame to that point, and gradually withdrawing the hard rod as this hard material is transferred to the soft cutting tooth until the rod finally separates from the sharp point thus built up.

4. In a method of repointing worn cutter chain teeth, joining a rod of hard material to the worn tooth, and withdrawing said rod away from the tooth while the point of juncture is heated to a semi-fluid state whereby the tooth is provided with a sharp tip of hard material at its point of separation from said rod.

5. In a method of repointing worn cutter chain teeth, applying a rod of hard material to the worn tooth, applying a; flame at the point of juncture of the rod with the worn tooth, melting the rod and transferring a portion of it to said tooth,- and gradually withdrawing the hard rod away from said tooth until separation occurs, whereby said tooth is provided with a hard sharp tip at its point of separation from the rod.

JOSEPH F. JOY.

rod of hard material 

